X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/e557416818242c2e8b14ec03d321740fd83619e4..e8fa8f62da443bfc89c416d3eeafcde69c8c6403:/ssh.h

diff --git a/ssh.h b/ssh.h
index e7be138c..29c3c40a 100644
--- a/ssh.h
+++ b/ssh.h
@@ -1,5 +1,16 @@
+#include <stdio.h>
 #include <string.h>
 
+#include "puttymem.h"
+#include "network.h"
+#include "int64.h"
+
+struct ssh_channel;
+
+extern void sshfwd_close(struct ssh_channel *c);
+extern int sshfwd_write(struct ssh_channel *c, char *, int);
+extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize);
+
 /*
  * Useful thing.
  */
@@ -18,6 +29,10 @@
 #define APIEXTRA 0
 #endif
 
+#ifndef BIGNUM_INTERNAL
+typedef void *Bignum;
+#endif
+
 struct RSAKey {
     int bits;
     int bytes;
@@ -25,21 +40,46 @@ struct RSAKey {
     unsigned long exponent;
     unsigned char *modulus;
 #else
-    void *modulus;
-    void *exponent;
+    Bignum modulus;
+    Bignum exponent;
+    Bignum private_exponent;
+    Bignum p;
+    Bignum q;
+    Bignum iqmp;
 #endif
+    char *comment;
+};
+
+struct dss_key {
+    Bignum p, q, g, y, x;
 };
 
 int makekey(unsigned char *data, struct RSAKey *result,
-	    unsigned char **keystr);
+	    unsigned char **keystr, int order);
+int makeprivate(unsigned char *data, struct RSAKey *result);
 void rsaencrypt(unsigned char *data, int length, struct RSAKey *key);
+Bignum rsadecrypt(Bignum input, struct RSAKey *key);
+void rsasign(unsigned char *data, int length, struct RSAKey *key);
+void rsasanitise(struct RSAKey *key);
 int rsastr_len(struct RSAKey *key);
 void rsastr_fmt(char *str, struct RSAKey *key);
+void rsa_fingerprint(char *str, int len, struct RSAKey *key);
+int rsa_verify(struct RSAKey *key);
+unsigned char *rsa_public_blob(struct RSAKey *key, int *len);
+int rsa_public_blob_len(void *data);
+void freersakey(struct RSAKey *key);
 
 typedef unsigned int word32;
 typedef unsigned int uint32;
 
 unsigned long crc32(const void *s, size_t len);
+unsigned long crc32_update(unsigned long crc_input, const void *s, size_t len);
+
+/* SSH CRC compensation attack detector */
+void *crcda_make_context(void);
+void crcda_free_context(void *handle);
+int detect_attack(void *handle, unsigned char *buf, uint32 len,
+		  unsigned char *IV);
 
 typedef struct {
     uint32 h[4];
@@ -58,7 +98,7 @@ struct MD5Context {
 
 void MD5Init(struct MD5Context *context);
 void MD5Update(struct MD5Context *context, unsigned char const *buf,
-               unsigned len);
+	       unsigned len);
 void MD5Final(unsigned char digest[16], struct MD5Context *context);
 
 typedef struct {
@@ -67,58 +107,332 @@ typedef struct {
     int blkused;
     uint32 lenhi, lenlo;
 } SHA_State;
+void SHA_Init(SHA_State * s);
+void SHA_Bytes(SHA_State * s, void *p, int len);
+void SHA_Final(SHA_State * s, unsigned char *output);
+void SHA_Simple(void *p, int len, unsigned char *output);
 
-void SHA_Init(SHA_State *s);
-void SHA_Bytes(SHA_State *s, void *p, int len);
-void SHA_Final(SHA_State *s, unsigned char *output);
+void hmac_sha1_simple(void *key, int keylen, void *data, int datalen,
+		      unsigned char *output);
+
+typedef struct {
+    uint64 h[8];
+    unsigned char block[128];
+    int blkused;
+    uint32 len[4];
+} SHA512_State;
+void SHA512_Init(SHA512_State * s);
+void SHA512_Bytes(SHA512_State * s, const void *p, int len);
+void SHA512_Final(SHA512_State * s, unsigned char *output);
+void SHA512_Simple(const void *p, int len, unsigned char *output);
 
 struct ssh_cipher {
-    void (*sesskey)(unsigned char *key);
-    void (*encrypt)(unsigned char *blk, int len);
-    void (*decrypt)(unsigned char *blk, int len);
+    void *(*make_context)(void);
+    void (*free_context)(void *);
+    void (*sesskey) (void *, unsigned char *key);	/* for ssh 1 */
+    void (*encrypt) (void *, unsigned char *blk, int len);
+    void (*decrypt) (void *, unsigned char *blk, int len);
+    int blksize;
+    char *text_name;
+};
+
+struct ssh2_cipher {
+    void *(*make_context)(void);
+    void (*free_context)(void *);
+    void (*setiv) (void *, unsigned char *key);	/* for ssh 2 */
+    void (*setkey) (void *, unsigned char *key);/* for ssh 2 */
+    void (*encrypt) (void *, unsigned char *blk, int len);
+    void (*decrypt) (void *, unsigned char *blk, int len);
     char *name;
     int blksize;
+    int keylen;
+    char *text_name;
+};
+
+struct ssh2_ciphers {
+    int nciphers;
+    const struct ssh2_cipher *const *list;
 };
 
 struct ssh_mac {
-    void (*sesskey)(unsigned char *key, int len);
-    void (*generate)(unsigned char *blk, int len, unsigned long seq);
-    int (*verify)(unsigned char *blk, int len, unsigned long seq);
+    void *(*make_context)(void);
+    void (*free_context)(void *);
+    void (*setkey) (void *, unsigned char *key);
+    void (*generate) (void *, unsigned char *blk, int len, unsigned long seq);
+    int (*verify) (void *, unsigned char *blk, int len, unsigned long seq);
     char *name;
     int len;
 };
 
 struct ssh_kex {
+    /*
+     * Plugging in another KEX algorithm requires structural chaos,
+     * so it's hard to abstract them into nice little structures
+     * like this. Hence, for the moment, this is just a
+     * placeholder. I claim justification in the fact that OpenSSH
+     * does this too :-)
+     */
     char *name;
 };
 
-struct ssh_hostkey {
+struct ssh_signkey {
+    void *(*newkey) (char *data, int len);
+    void (*freekey) (void *key);
+    char *(*fmtkey) (void *key);
+    unsigned char *(*public_blob) (void *key, int *len);
+    unsigned char *(*private_blob) (void *key, int *len);
+    void *(*createkey) (unsigned char *pub_blob, int pub_len,
+			unsigned char *priv_blob, int priv_len);
+    void *(*openssh_createkey) (unsigned char **blob, int *len);
+    int (*openssh_fmtkey) (void *key, unsigned char *blob, int len);
+    char *(*fingerprint) (void *key);
+    int (*verifysig) (void *key, char *sig, int siglen,
+		      char *data, int datalen);
+    unsigned char *(*sign) (void *key, char *data, int datalen,
+			    int *siglen);
     char *name;
+    char *keytype;		       /* for host key cache */
 };
 
 struct ssh_compress {
     char *name;
+    void *(*compress_init) (void);
+    void (*compress_cleanup) (void *);
+    int (*compress) (void *, unsigned char *block, int len,
+		     unsigned char **outblock, int *outlen);
+    void *(*decompress_init) (void);
+    void (*decompress_cleanup) (void *);
+    int (*decompress) (void *, unsigned char *block, int len,
+		       unsigned char **outblock, int *outlen);
+    int (*disable_compression) (void *);
+    char *text_name;
+};
+
+struct ssh2_userkey {
+    const struct ssh_signkey *alg;     /* the key algorithm */
+    void *data;			       /* the key data */
+    char *comment;		       /* the key comment */
 };
 
+extern const struct ssh_cipher ssh_3des;
+extern const struct ssh_cipher ssh_des;
+extern const struct ssh_cipher ssh_blowfish_ssh1;
+extern const struct ssh2_ciphers ssh2_3des;
+extern const struct ssh2_ciphers ssh2_des;
+extern const struct ssh2_ciphers ssh2_aes;
+extern const struct ssh2_ciphers ssh2_blowfish;
+extern const struct ssh_kex ssh_diffiehellman;
+extern const struct ssh_kex ssh_diffiehellman_gex;
+extern const struct ssh_signkey ssh_dss;
+extern const struct ssh_signkey ssh_rsa;
+extern const struct ssh_mac ssh_md5;
+extern const struct ssh_mac ssh_sha1;
+extern const struct ssh_mac ssh_sha1_buggy;
+
+/*
+ * PuTTY version number formatted as an SSH version string. 
+ */
+extern char sshver[];
+
+/*
+ * Gross hack: pscp will try to start SFTP but fall back to scp1 if
+ * that fails. This variable is the means by which scp.c can reach
+ * into the SSH code and find out which one it got.
+ */
+extern int ssh_fallback_cmd(void *handle);
+
 #ifndef MSCRYPTOAPI
-void SHATransform(word32 *digest, word32 *data);
+void SHATransform(word32 * digest, word32 * data);
 #endif
 
 int random_byte(void);
 void random_add_noise(void *noise, int length);
+void random_add_heavynoise(void *noise, int length);
+
+void logevent(void *, char *);
+
+/* Allocate and register a new channel for port forwarding */
+void *new_sock_channel(void *handle, Socket s);
+void ssh_send_port_open(void *channel, char *hostname, int port, char *org);
+
+/* Exports from portfwd.c */
+extern char *pfd_newconnect(Socket * s, char *hostname, int port, void *c,
+			    const Config *cfg);
+extern char *pfd_addforward(char *desthost, int destport, char *srcaddr,
+			    int port, void *backhandle, const Config *cfg);
+extern void pfd_close(Socket s);
+extern int pfd_send(Socket s, char *data, int len);
+extern void pfd_confirm(Socket s);
+extern void pfd_unthrottle(Socket s);
+extern void pfd_override_throttle(Socket s, int enable);
+
+/* Exports from x11fwd.c */
+extern char *x11_init(Socket *, char *, void *, void *, const char *, int,
+		      const Config *);
+extern void x11_close(Socket);
+extern int x11_send(Socket, char *, int);
+extern void *x11_invent_auth(char *, int, char *, int, int);
+extern void x11_unthrottle(Socket s);
+extern void x11_override_throttle(Socket s, int enable);
+extern int x11_get_screen_number(char *display);
+void x11_get_real_auth(void *authv, char *display);
 
-void logevent (char *);
+/* Platfdorm-dependent X11 function */
+extern void platform_get_x11_auth(char *display, int *proto,
+                                  unsigned char *data, int *datalen);
+
+Bignum copybn(Bignum b);
+Bignum bn_power_2(int n);
+void bn_restore_invariant(Bignum b);
+Bignum bignum_from_long(unsigned long n);
+void freebn(Bignum b);
+Bignum modpow(Bignum base, Bignum exp, Bignum mod);
+Bignum modmul(Bignum a, Bignum b, Bignum mod);
+void decbn(Bignum n);
+extern Bignum Zero, One;
+Bignum bignum_from_bytes(const unsigned char *data, int nbytes);
+int ssh1_read_bignum(const unsigned char *data, Bignum * result);
+int bignum_bitcount(Bignum bn);
+int ssh1_bignum_length(Bignum bn);
+int ssh2_bignum_length(Bignum bn);
+int bignum_byte(Bignum bn, int i);
+int bignum_bit(Bignum bn, int i);
+void bignum_set_bit(Bignum bn, int i, int value);
+int ssh1_write_bignum(void *data, Bignum bn);
+Bignum biggcd(Bignum a, Bignum b);
+unsigned short bignum_mod_short(Bignum number, unsigned short modulus);
+Bignum bignum_add_long(Bignum number, unsigned long addend);
+Bignum bigmul(Bignum a, Bignum b);
+Bignum bigmuladd(Bignum a, Bignum b, Bignum addend);
+Bignum bigdiv(Bignum a, Bignum b);
+Bignum bigmod(Bignum a, Bignum b);
+Bignum modinv(Bignum number, Bignum modulus);
+Bignum bignum_bitmask(Bignum number);
+Bignum bignum_rshift(Bignum number, int shift);
+int bignum_cmp(Bignum a, Bignum b);
+char *bignum_decimal(Bignum x);
+
+void *dh_setup_group1(void);
+void *dh_setup_group(Bignum pval, Bignum gval);
+void dh_cleanup(void *);
+Bignum dh_create_e(void *, int nbits);
+Bignum dh_find_K(void *, Bignum f);
+
+int loadrsakey(char *filename, struct RSAKey *key, char *passphrase);
+int rsakey_encrypted(char *filename, char **comment);
+int rsakey_pubblob(char *filename, void **blob, int *bloblen);
+
+int saversakey(char *filename, struct RSAKey *key, char *passphrase);
+
+extern int base64_decode_atom(char *atom, unsigned char *out);
+extern int base64_lines(int datalen);
+extern void base64_encode_atom(unsigned char *data, int n, char *out);
+extern void base64_encode(FILE *fp, unsigned char *data, int datalen, int cpl);
+
+/* ssh2_load_userkey can return this as an error */
+extern struct ssh2_userkey ssh2_wrong_passphrase;
+#define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
+
+int ssh2_userkey_encrypted(char *filename, char **comment);
+struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase);
+char *ssh2_userkey_loadpub(char *filename, char **algorithm,
+			   int *pub_blob_len);
+int ssh2_save_userkey(char *filename, struct ssh2_userkey *key,
+		      char *passphrase);
+
+enum {
+    SSH_KEYTYPE_UNOPENABLE,
+    SSH_KEYTYPE_UNKNOWN,
+    SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2,
+    SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM
+};
+int key_type(char *filename);
+char *key_type_to_str(int type);
+
+int import_possible(int type);
+int import_target_type(int type);
+int import_encrypted(char *filename, int type, char **comment);
+int import_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase);
+struct ssh2_userkey *import_ssh2(char *filename, int type, char *passphrase);
+int export_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase);
+int export_ssh2(char *filename, int type,
+                struct ssh2_userkey *key, char *passphrase);
+
+void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
+void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
+void des3_decrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
+			      unsigned char *blk, int len);
+void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
+			      unsigned char *blk, int len);
+void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk,
+			   int len);
+void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk,
+			   int len);
+
+void des_encrypt_xdmauth(unsigned char *key, unsigned char *blk, int len);
+void des_decrypt_xdmauth(unsigned char *key, unsigned char *blk, int len);
 
 /*
- * A Bignum is stored as a sequence of `unsigned short' words. The
- * first tells how many remain; the remaining ones are digits, LS
- * first.
+ * For progress updates in the key generation utility.
  */
-typedef unsigned short *Bignum;
+#define PROGFN_INITIALISE 1
+#define PROGFN_LIN_PHASE 2
+#define PROGFN_EXP_PHASE 3
+#define PROGFN_PHASE_EXTENT 4
+#define PROGFN_READY 5
+#define PROGFN_PROGRESS 6
+typedef void (*progfn_t) (void *param, int action, int phase, int progress);
+
+int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,
+		 void *pfnparam);
+int dsa_generate(struct dss_key *key, int bits, progfn_t pfn,
+		 void *pfnparam);
+Bignum primegen(int bits, int modulus, int residue, Bignum factor,
+		int phase, progfn_t pfn, void *pfnparam);
 
-Bignum newbn(int length);
-void freebn(Bignum b);
-void modpow(Bignum base, Bignum exp, Bignum mod, Bignum result);
 
-Bignum dh_create_e(void);
-Bignum dh_find_K(Bignum f);
+/*
+ * zlib compression.
+ */
+void *zlib_compress_init(void);
+void zlib_compress_cleanup(void *);
+void *zlib_decompress_init(void);
+void zlib_decompress_cleanup(void *);
+int zlib_compress_block(void *, unsigned char *block, int len,
+			unsigned char **outblock, int *outlen);
+int zlib_decompress_block(void *, unsigned char *block, int len,
+			  unsigned char **outblock, int *outlen);
+
+/*
+ * SSH1 agent messages.
+ */
+#define SSH1_AGENTC_REQUEST_RSA_IDENTITIES    1
+#define SSH1_AGENT_RSA_IDENTITIES_ANSWER      2
+#define SSH1_AGENTC_RSA_CHALLENGE             3
+#define SSH1_AGENT_RSA_RESPONSE               4
+#define SSH1_AGENTC_ADD_RSA_IDENTITY          7
+#define SSH1_AGENTC_REMOVE_RSA_IDENTITY       8
+#define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9	/* openssh private? */
+
+/*
+ * Messages common to SSH1 and OpenSSH's SSH2.
+ */
+#define SSH_AGENT_FAILURE                    5
+#define SSH_AGENT_SUCCESS                    6
+
+/*
+ * OpenSSH's SSH2 agent messages.
+ */
+#define SSH2_AGENTC_REQUEST_IDENTITIES          11
+#define SSH2_AGENT_IDENTITIES_ANSWER            12
+#define SSH2_AGENTC_SIGN_REQUEST                13
+#define SSH2_AGENT_SIGN_RESPONSE                14
+#define SSH2_AGENTC_ADD_IDENTITY                17
+#define SSH2_AGENTC_REMOVE_IDENTITY             18
+#define SSH2_AGENTC_REMOVE_ALL_IDENTITIES       19
+
+/*
+ * Need this to warn about support for the original SSH2 keyfile
+ * format.
+ */
+void old_keyfile_warning(void);